Polishing-machine.



0. L. noscn. POLISHING MACHINE. APPLICATION YILED SEPT. 15: 1910.

1,020,946, Patented Mar. 19, 1912.

v 2 SHEETS-SHEET 1.

0.L. DOSGH.

, POLISHING MACHINE.

' APPLICATION FILED SEPT. 15, 1910. 1,020,946, Patented Mar. 19, 1912.

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UNITED STATES PATENT OFFICE. oLrvE a L. noscii, or mxzanmn, new mushy; nssreuoa 'ro rma smear. MANUFAC- roams conramr, A coarom'rron or NEW masmr.

POLISHING-MACHINE.

To all it may concem:

Be it known that LOuvnn L. Boson,

a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Polishing-Ma chines, of which thc fpllowing is a specification, reference being had therein tothe accompanying drawings. 1

This invention relates to an unproveinent'in automatic machines for. grinding or polishing the heads of screws and other articles, and it has for its object to provide a simple and effective mechanism for performing the-work required.

In accordance )Xlth the present invention the machine is constructed with a frame in which is .journaled a rotary turret carr ing a plurality (if-radially arran ed chuc and concentricallv arranged-wit the axis of motion of said turrct is a, series of m tary spindles each carrying an abrading wheel adapted to operate successively upon the articles mounted within said chucks.

The abrading wheel spindles are provided with pulleys embraced by a common drivin'g belt from the source of power-which also embraces a driving wheel .operatively connected with the feeding mechanism for imparting the. requisite step-by-step motions of the turret and with mechanism for rotating the several chucks upon their supporting turret. Means are provided for automatically clamping the articles to be operated upon within their respective -chucks and forssuccessively releasing the same after the work is finished. I y The present--=1mprovement includes various constructivflieatures contributing to the effectiveness and. certainty of action of advance movement thereof from one-'pbL 5.5lo if i the chucks yvith the articles t 'ishing'station to the next. Fig. 5 is a detail perspective viewof the adjusting means for the cam for controlling the engagement 0 poldrivin Patented Mai-1x19, 1912.

ished. .Fig. 6 is a perspective view, partly in section, of another portion of the turret releasing means, and Fig. 7' is a detail perspective view of a portion of the turret feeding mechanism.

The frame of the machine is construct- ,ed with upright standards 1 in the form of .provided with a bearing boss 8 having a cap.9 secured thereon by screw 10 in which are journaled hollow bosses 11 and 11 of the end caps 12 and 12 of the turret which is shownherein formed with a hollow hexagonal body. 13 having extending radially from its outer faces the yokes 14 afl'ording bearing bosses 15 for the chucks. The body 13 of the turret is formed with apertures in alinement with the bearing bosses 15 of the .yokes 14, provided with bushing 16 having journaled therein the tubular hubs 17 of the bevel-pinions 18 meshing with a common bevel wheel 19 whose hub 20 is secured 1 means of the pin 21 upon one end.- of a 5 gift 22 journaled in bushings 23 within one of the tubular-hubs 1.1 of the turret and locked against endwise movement in said bushings by means of the collar 24 secured by a pin 25 upon said shaft. To the threaded outer ends of the bevelpinion hubs 17 are applied the internally threaded thrust-collars 26 for insuring against the endwise movement of the pin ions.

Each of the work-holding chuck; coniprises a tubular spindle 27 slidingly fitted within the bore of its respective bevel-wheeh hub and locked against turning therein by means of a spline 28.- The.- outer end of its shank is enlarged to form a head 29 having a cylindrical exterior face and an outwardly flaring interior face to which latter is fitted the correspondingly shaped split work-holding member 30 aflording a series of relatively yielding workdiolding jaws providing a socket to receive the shank of the screw or other article whose outer end or head is to be ground or pol- .ished. The inner end of the work-holding plug or member 30has an axially threaded aperture in which is secured the correspondingly threaded stem 31 whose enlarged inner end portion 32 is fitted slidingly within the bore of and splin'ed to the tubular spindle 27 and'is roundedat its extremity.

Between the shoulder of the stem 31 af forded by the enlargement 32 and the chuck spindle head 29 is interposed a spring 33 acting to normally force the stem 31 inwardly to close the chuck upon the work;

and between a thrust-collarf34 adjustably secured by means ofthe set-screw 35 upon the spindle 27 and the inner end of a socket in the bevel-wheel hub 17 surrounding the spindle 27 is interposed a stronger spring 36 tending to force outwardly the tubular shank and the work-clamping parts carried thereby. To the enlarged outer end portion or head 29 of the spindle 30 is adjustably secured-by means of a set-screw 37 a stop-coL lar .38 which serves to limit the outward movement of the chuck under the action of the spring 36.

The cap 12 of the turret is formedwith an inwardly extending bearing hub. 39 in which and in the oppositely extending hearing boss is journaled the cam-spindle 40 disposed in substantial alinement with the shaft 22 and carrying the substantially snailsha ed chuck-release cam 41 in alinement wit 1 the several convergent-1y arrangedstems 31, said shaft having fixed upon its opposite end the hub/12 of an arm 43 having a sega IllQlllTtllSlOlJd-l entered by the threaded's'hank 4 :01? a tap-bolt screwed into the bearing boss 8 and adapted to clamp the arm 43 hm ween its head 45* and said bearing boss in ditl'erentangular positions for the required circular adjustment of the cam 41. As will be seen by reference to Fig. 1 the cam 41 has an inner or lower concentric portion 41" extending through an 'arc of considerably more than a halt circle, and aconcentric high portion 41" covering an arc of about 60; the former being of such diameter as to clear the rounded inner extremities of the chuckstems 31, while the diameter of the concentric portion 41 is considerably greater so as to engage and hold the extremities of 'the chuck-stemsoutwardly in chuck-releas-l ing position. 'The inclined portion 41 intermediate the concentric lower andiliigher ram portions operates in the rotation of the turret around the cam togradually engage and press the chuck-stems successively outward, and the abrupt shoulder 41 insures the nl'ir'npt release 'of the stems 31, to enable he (buck to clamp the work in position under the a tion of the spring 33, l he standards 1 are further provided with about bearingbosses 46 disposed insub- Stautially circular arcs concentric with the axis ofthe shaft 22, and each of -said'bos ses 15 provided with a bushing 47 havipgan ecc ntric longitudinal bearing aperture 48,

with a flange 49 near one end carrying aboss 50 concentric with the bearing aperture. Adjustably secured in the eccentric aperture of each bushing 47, by means of thiset-screw 51, is a bar 52 having in the end adjacent the boss 50 a conical aperture 53 adapted to be entered each by a conical end of the polishing-wheel spindle 54 carrying the abrading or polishing wheel clamped thereon against the flange 56 by means of a disk 57, and a nut 58'applied to the adjacent threaded end portion of the spindle. As indicated" in Fig. 2, each of the 'abrading wheels is arranged in the plane of the several chuck-spindles, and its abrading portion is slightly concaved or shaped to fit the adjacent end of-the article to be operated upon. Upon each of the spindles 54ndjacent its .abrading wheel is fixed a flanged belt-pulley 59. Upon each of the alined bushings of eachpair, intermediate the flange 49 and its respective bearing boss 46, is adjustably clamped by means of the screw 60 a strap 61 at one extremity of the yoke 62, the turning of which by the attendant will serve to shiftthe eccentri'cally arranged center-bars 52 for the spindles 54 nearer to or farther from the/turret. as may be desired for different classes of work.

Suitably journaled in themachine frame parallel with the axis of motion of the turret is the driving shaft 63 from which are derived the feeding movements of the turret and the rotary motions of the chucks car- 'ried'thereby. This shaft has .fixed thereon the flanged belt ulley 64. The driving belt ,65 from a suita 1e pulley at the source of power is led over and around the upper abrading wheel-pulley 59 thence over and around the adjacent abrading wheel pulley, around the fixed pulley 64 on the d 'ti ving shaft 63 and thence successively around the two lower'abrading-wheel pulleys 59 and back to the ulley at the source-of power,

whereby one 1. of the abradingwheels is 4 actuated-directly by a common transmitting member from the source of power "from which the driving shaft 63 is drivenifij-The driving shaft 63 carries a second pulley 66 operatively connected by means of the belt 67 with a pulley 68 having its head 69 loosely mounted upon the cam-shaft 70 journaled in suitable bearings provided therefor in the frame-standards 1. The automatically arranged web 68 of the pulley 68 carries ,two shouldered studs 71 ,to whose reduced threaded ends 72 are applied the nuts 73 and washers 74, and to whose larger ends are fitted the loose pinions 75 confined-tl|ere-- on by'the heads 71" and having l'ixed 'upon their hubs the pinions 76 meshing'iu'i tlt the gear-wheel 77 keyed upon the camshaft 70,

Meshing with the pinions 75 is an 'intermediate pinion 78 .which is fitted to antlkeyed upon the hub 79 of a ratchet-wheel, (llltiosely mounted upon..'the cam-shaft'70tiiid'ncirmally held from rotation by means of a pawl 81 pivotally mounted upon a stud 82 secured in'the web of the standard 1, the point of said pawl being normally maintained-1n contact with the teeth of the ratchet-wheel 80 by means of a-s ring 83 having one end connected with pawl and the other end attached to the standard 1.

The. train of gearing 'just. described constitutes a planet mechanism afi'ording a specdrreducing device between the driving shaft 63 and the cam-shaft- 70, but itwill be evident that when the pawl 81 is disendisk 84 provided in the face nearest the pulley 68 with a feed-actuating cam-groove 85 and in the opposite face with a turret-'- release actuating cam-groove 86. The camgroove 85 is entered by a roller-stud 87 carried by the depending arm 88 of a rocklever mounted uponfa fulcrum-stud 89 secured in a perforated boss 90 of l the fadjacent framestandard '1, said rock-lever having an upwardly extending arm 91 carrying at its upper-end a segmental rack 92 meshing with a segmental series of gear teeth 93 upon one side of a disk-94 which is loosely mounted upon an enlargement of the boss 11" of the-turret and provided with a projecting lug 95 carrying a stud-pin 96 upon which is mounted a feed-pawl 97 whose operative end engages the teeth of a (i-toothed ratchet-wheel 98 having its hub 99 secured by means of the key 100 upon a second enlargement of the boss 11 of the turret. The: proportions of the parts are such that each rotation of the. canrwheel 84 causes-the vibration of the rock-lever 88 91 through an angle sutlicient to impart an advance movement of to the turret and a dwell of the same during the retraction of the )awl 97'and subsequent inaction of the fee -actuating rock-lever until the succeeding actuation of the latter.

To prevent the overthrow or retrograde movement of the turret under the actionof its feeding or advancingmechanism and to insure the accurate register of each chuckspindle with its res ective polishing wheel at the several polis ing stations :1 locking device is employed. This consists of a cir- .cular index-plate101 shown herein integral with the cap 12 of the turret and provided with a series of flaring peripheral notches 102 corresponding in number and eripheral spacing with the chuck-spindles 27. Secured to the nearer standard 1 is a bracket 103 formed with a socket 104.; in radial relation with the disk 101 and in which-is slid ingly' man the bolt ioa formed with tapered operative end 100 carrying a laterally projecting stud 107. Thebolt 18 formed.

with a longitudinal socket 108 between thebottom of which and an. adjacent screw-pin 109 carried b the bracket is interposed a s irin yll0 a a )ted to 'ress the bolt norl l" l P mally toward the disk 101 and into the notches 102 therein. One side of the socket- 101 is inclined to the parallel-sided bolt 105 to receive an adjusting wedge 111 adjustably secured in position in a wellknown manner by means of pushand pullscrews 112 and 113 the latter only of which is shown in the sectional representation in Fig. 1. As the wedgeshaped end 106 of the bolt is maintained by the sprin normally in engagement with one oithe notches .102 of the lockin disk 101, so as'to maintain the turret loc ed against either advance or retrograde movement, means are provided for periodically disengaging the locking bolt. from the peripherally notched .disk preparatory 'to the actuation'of the feeding mechanism for imparting an ad-' vance. movement to'fthe turret. The groove 80 of the cam-disk 84: is entered by a roller-" stud 114 carried by the dependingarm 115 of a rock-lever also fulcrumed upon the" stud 89 and having an upwardly extending arm 116 formed with-an elongated eye 117- which is entered by a lateral pin 118 upon the offset car 119 of the bracket-piece 120 with apertures 121 entered by fastening screws 122- by which it is secured to a circu lar plate 123 loosely "mounted upon'the reduced port-ion 'of the turret hub 11 whose adjacent portion is journaled in the bearing boss 8 of the standard 1. The rocking plate 123 carries a lateral'fulcrum-st-ud 12 1 upon which is'journaled the hub 125 of the bolt retractor arm 126 which isformed with a lateral lifting plate 127 havingparallel up-. per and lower faces, the arm 126 being sustained upon its fulcrum-stud 124 by means of a stop-pin 128 rojecting from the adjacent face of the p ate 123 and upon which the lower edge of the arm 126 normally ICStS.

- In the normal position of the parts represented in Figs. 1 and 6, the forward end of the upper face of the lifting plate 127 is I disposed slightly beneath the, roller-stud 107 of the bolt 105, and the plate 127 is arranged at an inclination withthe circum- I ferenm: of the plate 123 As the lifting ment than its len th, the stnd.106 rides ofi 1 the rearward en, of the lifting plate and per nuts the'holt -nnder theaction of its 2 plate moves forward under the action oi the gmmzw.

sprin toassume contactr elation with the circular periphery of the "index-platelOl,

' while the-retrograde movement of the rocking plate 123 causes the lower faceofthe lifting plate 127 to ride up over the stud 107- without affecting the position of the; same. As the action of the feeding mecha- .'nism, begun during the retraction of the reduced and threaded end portion of the which the cam-shaft may be turned by'hand. when the -pawl 81is disengagedfrom the.

bolt 105, is completed, to bring a succeeding notch 102 of the index-plate 101' into register with the nose 106 of thebolt-1Q5, the latter enters the notch under theactionpf its sprin 1-10'and locks the index: late with the attac ed turret intheirequire position,

In order tr rotate" thechu ck-spindles upon the turret, the shaft 22 carrying the-bevelwheel'19, constitutifig a common driving member for the several bevel pinions 18, has fixed thereon the pulley .129 which is' connected by meansof a belt 130 with a larger pulley 131 havin'gits hub 132 fixed upon the cain-shaft70 by means of ithe clamp-nut 133 and the key134. Upon the opposite end-of the cam-shaft is secured by sim lar means the hub 135 of a hand-wheel136 by means of ratchet-wheel 180; I

Preparatory'tothe adv ance of the turret from one operative station to the -next to carry the work from operative relation with one 'abradingwheel '55 to the next,-it is de-- 'sirabl thatthe abrading ,wheel be retracted so that the work'will bepresented only in substantial radial relation with the abra in'g wheels. To this end, one of the straps 61 of each of the yokesl62 is provided with a projecting In 137' to which is connected b means of t e bolt 138 one'end of a bent lin 139 whose opposite endis provided with an eye-entered by a 'pin 14Q upon the offset ear 1410f the bracket-piece I42 secured by fas-' tening screws 143 upon the rocking plate 123. \Vhen the plate 123'is rocked to operate the bolt-lifting means preparatory to a feeding" operation, the several yo'kes 62 are turned by their described connections with the rocking plate 123', so 'as to laterally shift the eccentrically' "disposed center-bars 52 journaled in the bushings 4:7 and thereby-re tract the abrading wheels 55 during the feeding of the turret between' stations, the rcturn'of therocking plate to initial osition serving to restore theabraoling w ieels to inital operativerelation withthe turret.

In certain classes of work, these connections between the yokes .62 and the rocking plate 123 may be dispensed with, although desirable in certain other conditions. It will be ob served that by loosening the 'cla m p-screws' 60, the position ofthc'straps-upon the bushings 47 may be independently adjusted to determine the operative relation'of the abrading wheels55 to the chucks without all'vctiug the simultaneous retraction of the abrading wheels during the movements of the turret.

In the operation of the machine, the mech anism having been set in -motion,the attend- "ant isstationed at the right (Fig. 2) and successively introduces in the open chuck.

nearest the locking bolt 105 the shanks of the articles a to be operated upon. In the succee'ding feedin'gaction of the turret, the end of the enlargement 32 of the stem. 31 of'the inner chuck memberdrops off the shoulder at 41 of the release'cam 41, whereby the spring 33 actsto draw Qinwardly the chuckmember 30 and clamp the body of the article firmly in position which it maintains while passing through the several stations adjacent the abrading wheels 55. in passing from the last operative station above the lower cam incline 41 to the concentric higher portion IR-and is forced outwardly in opposition to the spring 33 so as to release the article operated upon, which is permitted to 'fall by ravityfrom. a position below the center 0 the axis of movement of the turret into a suitable receptacle provided beneath the same. The object of the spring 36, as

will be obvious,'is,to force the chuck bodily outward to maintain it in witlithe. abrading wheels. I

Having thus set forth the nature of the invention, what I-claim herein is yielding contact 1. A machine of the class described comprising a rotary turret, a plurality of radially arranged chucks carried thereby, aphi- 'abradingwheel, the member 32 rides up the I rality of abrading wheels arranged concentric with the axis of motion of said turret,

means for independently adjusting said abrading wheels toward and from said tur-- ret, means for simultaneously adjusting said abrading wheels relatively to said turret,pulleys connected with said abracling wheels, and a 'common belt connection ,from the source of power en'ibracing said pulleys for imparting rotary motion to the abrading wheels. I

A machine of the class described comprising a rotary turret, a plurality of radially arranged chucks carried thereby, feeding means for imparting stepby.-step rotary movements to said turret, a plurality of" ahrading wheels arranged concentric with tric with the axis of motion of said turret, i

the axis of motion of said turret pullcys connected with said abrading wheels and with the turret feeding means, and a common belt connection from the source of power embracing said pulleys. 4. A machine of the class described comprising a rotary turret,a plurality of radially arranged chucks carried 'tliereby,.

feeding means for imparting steprby-step rotary. movements to'said turret, means for imparting rotating movements to said chucks independently of the movements'oithe turret, a plurality of abrading wheels arranged concentric with the axis of motion of said turret, pulleys connected withsaid aorading 1 wheels and with, the turret feeding means,.

ment of said turret intermediatethe actua tions ofsaid fecdingmeans, and releasing means independent of the turret actuating means for disengaging the locking means from said turret preparatory to each advance of the latter. I

, 6. A machine of the class described comprising a rotary'turret, a lurality of radially arranged chucks carried by said turret, an; abrading. wheel arranged adjacent said turret, means for rotating said abrading whee], feedingmeans for imparting step'by step rotary movements to said turret, locking means for, restraining the movement of said turret intermediate the actuations said feeding means, releasing means for the turret locking means, a cam, an op- :erative connection between said cam, and said feeding means, and an independent op- 45 erative conneotionbetween said cam and i said releasin means. i

17.; A machine otthe class described comprising a rotary turret provided'with a se ries of circularly arranged sockets, a plut tt'rality of radially arranged chucks carried by said turret; an abrading wheel arranged adjacent said turret, means for rotating said abrading wheel, feedingmeans for imparting step by steprotary movements to said :35 turret, a spring-pressed locking'bolt adapted to successively enter said sockets. of the turret, and means independent of the tar;

ret' feeding means and acting upoILsaid bolt to disengage the same from the turret pre- 00. paratory to eachactuation of the latter.

A. machine of the class described comprising a rotary turret provided with. a se ries of circularly arranged sockets,'a plurality of radially arranged chuclrs carried by said turret, an abrading wheel arranged adjacent said turret, means for rotating. said abrading wheel, feedingmeans for imparting step-by step rotary movements to said turret, a spring'pressed locking bolt provided with a lateral shoulder and adapted to successively enter SilldSOtZltGtS of the furret, a reciprocating carrier, means independent of said feeding means for actuating the same, and a bolt-retractor pivotally mounted upon said carrier and having substantially" parallel operative faces inclined to. the direction of movement of said carrier and adapted'to alternately engage the lateral shoulder of said bolt. Y

9. A machine of the class described comprising a rotary turret provided with a series ,of circularly arranged sockets, a plurality of radially arrai' ged chucks carried by said turret, an abrading wheel arranged adjacent said turret, means for rotating said.

abrading wheel, an actuating cam, means.

for driving the same, a clutch device in cluding a driven member connected with said turz et, and an oscillatory driying memher, a rock-lever operatively connected with said cam and with the oscillatory driving clutch member, a lockingbolt provided with a lateral shoulder and adapted to successlvely enter saids'oclrets ofthe turret, a rock mg carrier, a roclt lever operatively con-- nected with said cam and. with said carrier, 7

and a boltretractor pivotally mounted upon said carrier and having substantially at allel operative faces inclined to the direc tion of movement of said carrier and adapt ed to alternately engage the lateral shouh der of said bolt.

10. A maehineot: the described com prising a rotary turret, a plurality o1f ra' diallyarranged chucks mounted therein for movement. toward and from the axis of rotation of the turret and each including a luralitv of worlrholdin aivs' and a a J spring-pressed spindle whereby they are clamped upon the Work, a spring :tor forcing said chucks bodily outward from said axis of rotation, means for imparting step by-step rotary movements to said turret, an

abrading wheel, means for rotating the same, and a releasing cam adapted for successive engagement with the chuck spindles lie for opening each chuck to release the worirf In testimony whereof, I have signed my name to this specificatiom inthe presence of two subscribing Witnesses.

DLIVER L. IJUECH;

Witnesses:

Henry J. llllLLErz, H. A" Konnnsmnri, Jr, 

